Expansion-joint for concrete water-pipes.



EXPANSION JOINT FOR CONCRETE WATER PIPES.

APPLICATION FILED JAN. 25. 1914;.

i and State of New 'sioi'i pint which is absolutely ALLAH M. HTIELSH AINB COLEMAN MEEIWETHER, 3E MONEPICEJELER, m JGHN C.

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EXEANSION-J'UINT EGR CONCRETE ATER-E'IPES.

Specification of use see.

To a ZZ whom it may concern Be it known thet we, ALLAN ill. Hmsu and COLEMAN Memwermis, residing at Montclair, and J0EE? G. Mir-01mm, residing at East Orange, all in the ccuutyoif Essex.

Jersey, have invented certain new and useful lmprcvements is El:- pm1sion-Joints for Concrete Water-Pipes, of which the following is a, full, exact description, reference being lied to the drawings accompanying and forming a pest of the same. v

This invention is an impic'vemeut in ecu-' crete pipes which esigued to stand so internal pressure ind consists of. as novel form of Water tight expansion joint for the abutting sections of such-e structure I l The efforts to secure such a, joint fcr pipes of this character have led to a vest amount of experiment and involved a very large expense. If properly made, the ccncrete of which the sections are composed is virtually Water ti .glit under even very high pressure, but no practicable means has ever been devised, so far as we know, which the joints be made tc resist the leakof such it pipe can age of water when the pipes are efipcsed to ordinary conditions of actual use. Cement or concrete gradually contrects'ior long period after manufacture installation This i138 e tendency to Wee-lien cr impair t joints in pipe line after its completion,

pcrticulrly When under pressure, We- "ter will. flow freely through the CIFiClsTS,Wl1lCll are too smell to be detected by the naked eye. It is, moreover, almost impossible in tice to lay sucli pipe on foundations so stable that there is no settling or upheaval of the same with si'esultant bending of the pipe and impairment of the joints, which latter are obviously the Weakest points in the line. We have conducted a very extensive and elaborate series of experiments with such pipes, with a view to obviating these objectious end'lmve produced is form of expan- Water tight under all ccuditions of internal or external pressure to which such pipes are likely to be subjected, which is simple in construction, inexpensive and highly ciiicient.

Specifically, stated, this invention is as follows: The sections of pipe are formed in molds of a suitable quality of concrete. each section being made with e spigot at one end meters recent. fizi'teicted see, er, Lkpplicetion sled mis r lei i. Serial so. sewer. I

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sud ebell at the other, the bell being slightly ioriger than the spigot, so tliet when the send sections ere assembled an annular groove or recess will be formed on the interiorjcf the pipe between the extremity cf tile spigot god the base of the liell. lii prectlce, sucli'pipe secticns are molded with e reiuficrcirig mete'ifi of netting c-r sheet oferzpecded metal emioedded tlierein," which. extends beyond the body of concrete at both ends and which cverleps in the groc'vcoi recess. The letter, the, sections are brought abutting contact, then filled wi h cement, cement mortar or concrete, to form a smooth interior Wall end. to unite the rinlcrce mer ts oiudjsccnt sectiocs. Whis cwstruo tion is illustre'ted in pet-est to Coleman Meri- Wetlier, No. 89 of Jilly 9;, 1308,

According to our present invention, we cast or mold in sectic gi of pipe, at tlie spigot end thereof and so asg to project from the extreme end of the spigot, a cylinder of metal, preferably ccpper', having :1 circumfereutiei fcld crimptliat is embedded in the end of ti gigci iffliezi twoeectioiis of pipe thus constructed brought into el3utting contact, the outer or uncovered end of this cylinder extends into the groove :cr recess between the two pipes, and when this" grc'cve is filled with cement, cr cement mortar, the copper bend cr'cyliiider is embedded. therein and forms water-tight union between the two sections, which is cspeble oi expsiision 'e itlicut impairment of its waterproofing cperties.

ice, the ends er cf the co pcr cylinder are ribbed, clumped or folded over, in crder to anchor the metal in the concrete 0% the pipe section end cement of the joint, and in order elicit the Weakest point of the joint may be at the proper point with respect to the copper cyl' der, the end or face of the spigot, prior tc tlie asseirilaliiigg 01 the sections, is coated or paintedwith asplmltum, or any equivalent substance to which the cement filling for the groove will set sdliere r th the same tencc genercliyin the term into I fill inch between two adjacent pipe sections does not impair in any Way the integrity, nor water tight properties of the joint, andthis is true in pipes of the largest size, the joint having proved entirely satisfactory in pipes seven feet or more in diameter.

In the drawing hereto annexed, We have illustrated the improved joint as applied. to the particular form of pipe above described.

l igure 1 is a view in longitudinal section of av portion of a line of pipe, and Fig. 2 is i an enlarged sectional detail of the joint.

The several pipe sections are indicated by the letters A. llachsection is formed or molded with a bell B at one end and a spigot C at the other. The bell being somewhat longer than the spigot it forms an annular groove or recess around the interior of the pipe.

E is the cylinder or band of copper or other suitable non-oxidizable metal, formed with a crimp or fold I, which, preferably, lies-eml'iedded in the face or end of the spigot. The cylinder, during the process of molding, is cast in the spigot ends so thatits free end extends out into the recess. The face of the spigot has a coating of asphaltum or other like material I), and the surface of the bell is preferably roughened somewhat so that the cement filling G for the recess will take a lirm hold upon it. It is almost invariably necessary to reinforce these pipes, for which purpose they are molded with steel rods or fabric l-i, embedded in them. W hen this is done, we allow the rods or fabric to project from the bell end only, in which case it becomes embedded in the cement filler for the groove, as shown in the drawings.

In practice, the joint above described may he used between every two adjacent sections, or between every other two, or, in general, as the character of the work may demand. For example, a proper water tight joint may be used in every other union between the sections and this expansion joint used in the intermediate unions, to take 'care of the expansion and contraction of the pipe lines.-

in this system of construction when the copper cylinder is omitted from any section any propcr form of joint may be used in its placc.

It is hardly necessary to state that the invention is not limited to the specific form of pipe herein illustrated and described, but comprises the features set forth in whatever form of pipe they may be embodied.

Having now described our invention, what we claim is:

1. .ln expansion joint for concrete pressure pipes, formed by the combination of two abutting sections of pipe having a bell and spigot union, the bell end being longer, so as to form an annular recess or groove, a cylinder of impciforatc metal embedded in and extending out from the spigot end having a fold or crimp therein, the expansible portion of which rests against the surface of the spigot end and a filling of concrete or cement for the groove embedding therein the projecting end of the cylinder and the crimp or fold therein.

a fold or crimp therein, the expansiblc por-,

tion of which lies against the coated surface of the spigot end and a filling of concrete or cement for the groove.

3. An expansion joint for concrete pressure pipes, formed by the combinationof two abutting sections of pipe, having ag'bell and spigot union, the bell end being hanger, so as to form an annular groove or recess and the spigot end having a coating of asphaltuin, an imperforate cylinder of. copper embedded in the spigot end and extending into the groove having a fold or crimp therein, the expansible portion of which rests against the coated surface of the spigot end, and a filling of concrete or cement for the roove embedding therein the projecting end of the copper cylinder and the fold or crimp therein.

4. An expansion joint for concrete pressure pipes, formed by the combination of two abutting pipe sections having a bell and spigot union, in which one of the elements is longer than the other, so that an annular groove or recess is formed, an imperfo'rate metallic cylinder embedded in and extending from the shorter element into the groove having a fold or crimp therein, the expansible portion of which rests against the end surface of said shorter element and a filling of concrete or cement for the groove in which the projecting end of the cylinder and the fold or crimp therein are embedded.

5. An expansion joint for concrete pressure pipes, formed by the combination of two abutting pipe sections having a bell and spigot union, in which one of the elements is shorter than the other to form an annular groove at the joint, an imperforate cylinder of copper embedded in and extending from the shorter element having a fold or crimp therein which rests against the said shorter element, a coating of asphaltum for the fare. of the said shorter element, and a filling of concrete or cement for the groove, in which the projectin end of the cylindc' and the crimp or fold therein are embedded.

(3. An expansion joint for concrete pressaid groove having a fold or crimp therein,

the expansible portion oat Which rests against the end surface of one of the pipe sections and a filling of concrete or cement for the groove in Which the projecting end of the cylinder and the fold or crimp thereinv are embedded.

7. Anexpansion joint for-concrete pressure pipes, formed by the combination of two abutting pipe sections having an annular groove or recess at the line of union, an impertorate copper cylinder embedded in and pro ecting from the end of one section into the groove having a fold or crimp therein,

the expansible portion of which. lies against the surface of one of the said pipe sections,

a coating of asphaltum for the end of the said section, and a filling, of concrete or cement for the groove in which the projecting end of the cylinder and the crimp or fold therein are embedded.

8. Anexpansible joint for concrete pressure pipes, formed by the combination of two abutting pipe sections having a groove at the line of union, an imperforate cylinder of metal embedded in and extending from one section into the groove having a fold or crimp therein, the expansible portion of which rests against the surface of one of the said pipe sections, a coating of asphaltum on the end of the said section, a filling of concrete or'cement for the groove, and reinforcing metal extending from the uncoated section into the said filling of concrete.

9. An expansion joint for concrete'pres sure pipes, formed by the combination of two abutting pipe sections, having a groove at the line of union, an imperforate cylinder of metal embedded in and extending from one section into the groove having a fold'or crimp therein, the expansible portion of which rests against one of the said pipe sections, and having folds or crimps at its embedded ends to form anchors, and a filling of concrete or cement for the groove in which the projecting end of the cylinder and the folds or crimps therein are em bedded.

In Witness whereof We afiix our signatures in the p'resence' of two subscribing Witnesses.

ALLAN M. HIRSH.

COLEMAN MERIWETH'ER. JOHN C. MITCHELL. Witnesses:

M. LAWSON Dyna, THOMAS J. BYRNE, 

